Battery unit i.e. lithium polymer battery unit, for supplying energy to portable electronic device, has charging bushing freely accessible in use condition and non-use condition of battery unit, and projections provided in front side

摘要

The battery unit has a charging bushing i.e. micro Universal serial bus (USB)bushing, freely accessible in a use condition and non-use condition of the battery unit. An area of upper and lower sides of the unit is 3 times larger than a surface of side walls (110, 130), a left side wall and/or a rear side (120) of the unit. Projections are provided in a front side (140) of the battery unit. A catch (121) is provided in a center of the rear side. The rear side includes contact surfaces for providing voltage at ends of the rear side.